Conveyer belt printing machine with multiple impression



Nov. 13, 195] J TROZMULLER 2,574,941 CONVEYER BELT PRINTING MACHINE WITHMULTIPLE IMPRESSION Filed July 12 1949 INVENTOR.

Patented Nov. 13, 1951 CONVEYER BELT PRINTING MACHINE WITH MULTIPLEIMPRESSION Friedrich Josef Triizmiiller, Vienna, Austria, as-

signor to Semperit Osterreichisch-Amerikanische GummiwerkeAktiengesellschaft, Vienna,

Austria Application July 12, 1949, Serial No. 104,176 In Austria August14, 1948 6 Claims. I The invention relates to a printing machine forletter pressprinting operating with conveyor belts as carriers of theprinting blocks, and has the object of providing a machine of this kindwith which the printing can be effected on several side and printing onback side is diagrammatically represented by Way of example, but not oflimitation, in the accompanying drawing, in which:

Fig. 1 in a diagrammatic view of the printing machine; I 1

Fig. 2 in an enlarged detail sectional view of the cuttingand foldingdevice; and

Fig. 3 is an elevational view of the cuttingand folding device showingthe driving. gear for this device.

Printing can be made on four paper bands simultaneously, and while themachine illustrated is a very suitable former embodiment of theinvention, modifications thereof will suggest themselves to thoseskilled in the art, and I wish to be understood that the scope of myinvention is defined in the claims at the end of this specification, andis not limited to the embodiment shown.

In the embodiment shown there are provided two carriers for the printingblocks (forms) 4, which carriers consist of endless steel bands I and II, respectively, running vertically over driving and guide rollers, 2, 3and l3, M, respectively. On these bands the elastic and flexibleprinting blocks 4 are attached. These blocks adapt themselves to hug thecurvature of the rollers 2, 3 and l3, M, respectively While passing overthem and assume again a flat condition when running along With the bandon its straight stretches between the rollers.

On each side of the drivingand guide rollers 2, 3 and I3, M,respectively, there are four endless belts or bands '5 and Ill runningover transport rollers 6, I. These belts 5 and I0 serve for theadjustment and transport of the paper as will be described later. Thesetransport rollers 6 are journalled parallel and in one plane with theirassociated guide rollers 2,3 and 13, I4, respectively, and effect theprinting by pressing the paper band against the printing blocks 4.

Between adjacent transport rollers B there is provided at least oneinking device 8, so that each carrier of printing blocks has at leastfour associated inking devices which ink in the printing blocks 4 ontheir way to the corresponding transport roller 6. Each inking devicemay comprise an endless steel band 18 co-acting with a distributingroller 1 9. Supply of ink to the band [8 is effected by a supplyingroller 26 and a transmitting roller 2|. Two of the four inking devicesco-operating with the printing blocks 4 of the bands I and II,respectively, are arranged opposite to the drivingand guide rollers 2, 3and 13, M, respectively. The other two inking devices are arrangedadjacent to the straight stretches of the bands I and II, respectively,and opposite to rollers 22 arranged inside the said bands.

The paper bands are drawn off from four blank paper rolls 9 and arepassed first over the adjustment and paper transport belts 5 to theprinting blocks 4 of the printing block carrier I which effect theprinting on the upper side. From the adjustment and paper transportbelts 5 arranged between the printing block carries I and II the paperbandsrun over the adjustmentand paper transport belts I0 towards theprinting blocks 4 of the printing block carrier l l.

The paper bands drawn-off from blank paper rolls 9 arranged outside thecarriers of the printing blocks are then, after the printing on theupper side has been effected, passed over the deflector rollers 15 andthe adjustmentandpaper transport belts Hi to the carrier ll of printingblocks in order to effect the printing on the back side.

The paper, which is then printed on both sides, is passed subsequentlyto the cutting-and folding devices by deflecting rollers 23, 24, and isdeposited in piles 25.

Each cutting device comprises a roll 26 provided with a knife 21, andco-acting with a counterroll 28. The web of paper is fed between therolls 26 and 28, cutting the paper into sheets which are folded by thefolding device.

Each folding device comprises a folder 30, ,a folding drum 35 and a pairof belts 40 running over transport rollers 4|. The folder 38 is moved ina vertical directionby a reciprocating lever 31, pivotally mounted at 32and controlled by a cam 33. In the folding drum 35 there are radiallyarranged four slots 36 cooperating with the folder 30 to fold the sheetsof paper at the movements of said folder towards the center of thefolding drum. After return of the folder 3B in its raised position thedrum 35 and the folded paper pushed in the upright slot is turned about90 in.the clockwise. .direction.- This is effected by aMaltese cross 31.Thus the folded paper comes in a horizontal position close to thedraw-in mouth of the transporting belts 40, by which it is moved toright and is deposited in the pile 25.

In order to attain constant perfect synchronisation of the carriers Iand II of the printing blocks with the adjustmentand paper transportbelts 5 and In, which is essential for the prevention if displacementsof the impressions, the circumferential velocity of the two groups ofconveyer belts is brought into accurate agreement by means ofsynchronising components. In the embodiment shown the synchronisingmeans comprise toothed, wheel-works. However, various other gears,suchas bevel gears or chain gears may be-used for the synchronising. thecircumferential velocity of the different means for conveying the paperbands.

The main advantages of the printing machine according to the inventionconsist in a space-saving structure, the savings in material, weightand. costs, and in'the easy accessibility of the inkingandfolding-devices.

What I claim as my invention and desire to secure by Letters Patent is:

l. A printing machine for letter press printing comprising, incombination, a first printin mechanism for printing on the upperside'and a secondprinting mechanism for printing on the back side of aweb, each comprising elastic and flexible printing blocks, an endlessconveyer band arranged as carrier of said printing blocks and adapted torun under tension over driving and guide rollers, at least twoadjustment and paper transport means on each side of said conveyer band,each of said means including an impression roller adapted to cooperatewith the straight stretches of the conveyer band, a guide roller and anendless belt arranged for running over said rollers and in substantiallyparallel and horizontal stretches between said rollers, blank paperrolls arranged close to theendless belts ofsaid first printing mechanismand adapted for feeding paper bands to said belts, and deflector rollersfor leading at least theouter paper bands from the endless belts of thefirst printing mechanism'to the endless belts of the second printingmechanism.

2. A printing machine for letter press printing as claimed in claim 1,whereof the endless belts of both printing mechanisms lying between theendless conveyers of said mechanisms are arranged in pairs in such away, that the incoming part of the belts of the second printingmechanism forms the continuation of the outgoing part of the belts ofthe first printing mechanism.

3. A printing machine for letter press printing comprising incombination, a first printing mechanism for printing on the upper sideand a second printing mechanism for printing on the back side of a Web,each comprising elastic and flexible printing blocks, an endlessconveyer band arranged as carrier of said printing blocks and adapted torun under tension over driving and guide rollers, at leasttwo'adjustment and paper transport means on each side of said conveyerband, each of said means including an impression roller adapted tocooperate with the straight stretches of the-conveyer band, a guideroller and an endless belt arranged for running over said rollers and insubstantially parallel and horizontal stretches between said rollers,blank paper rolls arranged close to the endless belts of said firstprinting mechanism and. adapted for feeding paper bands to said belts,deflector rollers for leading at least the outer paper bands from theendless belts of the first printing mechanism to the endless belts ofthe second printing mechanism, and synchronizing means arranged foraccurately coordinating the circumferential velocities of said carriersof printing blocks and of thesaid adjustment and paper transport belts.

4. A printing machine for letter press printing comprising incombination, a first printing mechanism for printing on the upper sideand a second printing mechanism for printing on the back side of a web,each comprising elastic and flexible printing blocks, an endlessconveyer band arranged as carrier of said printing blocks and adapted torun under tension over driving and guide rollers, at least'twoadjustment and paper transport means on each side of said conveyer band,each of said means including an impression roller adapted to cooperatewith the straight stretches of the conveyer band, a guide roller and anendless 'beltarranged for running over said rollers and in substantiallyparallel and horizontal stretches betweensaid rollers, blank paper rollsarranged close to the endless belts of said first printing mechanism andadapted for feeding paper bands to 'said belts, deflector roll-' ersforleading at least the outer paper bands from the endless belts of thefirst printing mechanism to the endless belts of the second'printingmechanism, synchronizing means arranged for accurately coordinating thecircumferential velocities of said carriers of printing blocks and ofthe said adjustment and paper transport belts, and cutting and foldingdevices, arranged'for cutting the paper bands into sheets and foldingsaid sheets.

5. A printing machine for letter press printing comprising incombination, a first printing mechanism for printing on-the upper sideand a second printing mechanism for printing on the back side of a web,each comprising elastic and flexible printing blocks, an endlessconveyer band arranged as carrier of said printing blocks and adapted torun under tension over driving and guide rollers, at least twoadjustment and paper transport means on each side of said con-'- veyerband, each of said means including an impression roller adapted tocooperate with the straight stretches of the conveyer band, a guide ofthe said adjustment and paper transport-belts and at least aninking-in'means arranged between each adjacent impression rollers ofconsecutive adjustment and paper transport means and adapted to ink-inthe printing blocks intermediate said adjacent impression rollers.

6. A printingtmachine for letterpress print-L ing comprising incombination, a first printing mechanism for printing on the upper sideand a second printing mechanism for printing on the back side of a web,each comprising elastic and flexible printing blocks, an endlessconveyer band arranged as carrier of said printing blocks and adapted torun under tension over driving and guide rollers, at least twoadjustment and paper transport means on each side of said conveyer band,each of said means including an impression roller adapted to cooperatewith the straight stretches of the conveyer band at the ends of saidstretches, a guide roller and an endless belt arranged for running oversaid rollers and in substantially parallel and horizontal stretchesbetween said rollers, blank paper rolls arranged close to the endlessbelts of said first printing mechanism and adapted for feeding paperbands to said belts, and deflector rollers for leading at 6 least theouter paper bands from the endless belts of the first printing mechanismto the endless belts of the second printing mechanism.

FRIEDRICH JOSEF TR'OZMCILLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 324,986 Crowell Aug. 25, 1885509,528 Harper Nov. 28, 1893 769,296 Bender Sept. 6, 1904 15 1,214,538Gill Feb. 6, 1917 1,223,347 Stoddard Apr. 17, 1917 1,855,525 MacArthurApr. 26, 1932 2,031,063 Pesci Feb. 18, 1936 2,066,179 Keller Dec. 29,1936

